00367nam a2200145Ia 4500008004100000020001500041082001600056100001900072245002100091260004900112300000800161650002000169650001400189653001800203170901s1981    xx            000 0 und d  a0023225106  a304.2bC37H  aClapham, W. B. 0aHuman Ecosystems  aNew YorkbMacmillan Publishing Companyc1981  a419  aSocial sciences  aSociology  aHuman ecology